Device and method for supporting heterogeneous communication in wireless power transfer system

Abstract

The present specification relates to a device and method for supporting heterogeneous communication in a wireless power transfer system. The present specification discloses a wireless power reception device comprising: a power pickup circuit configured to receive, from a wireless power transfer device, wireless power generated on the basis of magnetic coupling in a power transfer phase; and a communication and control circuit configured to transmit, to the wireless power transfer device, a first random address packet including a random address of the wireless power reception device or receive, from the wireless power transfer device, a second random address packet including a random address of the wireless power transfer device via in-band communication. By performing a handover using a random address, cross reference can be prevented and security can be enhanced, and thus a BLE connection in a wireless charging system can be more safely performed.

What is claimed is: 
     
       1. A wireless power receiver, which supports an in-band communication and an out-of-band communication and receives a wireless power from a wireless power transmitter, comprising:
 a power pickup configured to receive the wireless power from the wireless power transmitter; and 
 a controller configured to control the reception of the wireless power, 
 wherein the wireless power receiver: 
 transmits random address information of the out-of-band communication via the in-band communication to the wireless power transmitter, 
 transmits an advertisement packet including the random address information, and 
 establishes a connection of the out-of-band communication with the wireless power transmitter after transmitting the random address information via the in-band communication and transmitting the advertisement packet. 
 
     
     
       2. The wireless power receiver of  claim 1 , wherein the out-of-band communication is a bluetooth low energy (BLE) communication. 
     
     
       3. The wireless power receiver of  claim 1 , wherein the wireless power receiver is an advertiser. 
     
     
       4. The wireless power receiver of  claim 3 , wherein the wireless power receiver starts advertising after transmits the random address information via the in-band communication, and
 wherein the wireless power receiver transmits the advertisement packet during the advertising. 
 
     
     
       5. The wireless power receiver of  claim 1 , wherein, based on establishing the connection of the out-of-band communication, the wireless power receiver transitions from the in-band communication to the out-of-band communication. 
     
     
       6. The wireless power receiver of  claim 1 , wherein, in a negotiation phase, the wireless power receiver transmits the random address information of the out-of-band communication via the in-band communication to the wireless power transmitter. 
     
     
       7. A method for receiving a wireless power from a wireless power transmitter, the method performed by a wireless power receiver, which supports an in-band communication and an out-of-band communication, and comprising:
 transmitting random address information of the out-of-band communication via the in-band communication to the wireless power transmitter; 
 transmitting an advertisement packet including the random address information; and 
 establishing a connection of the out-of-band communication with the wireless power transmitter after transmitting the random address information via the in-band communication and transmitting the advertisement packet. 
 
     
     
       8. A wireless power transmitter, which supports an in-band communication and an out-of-band communication and transfer a wireless power to a wireless power receiver, comprising:
 a power converter configured to transfer the wireless power to the wireless power receiver; and 
 a controller configured to control the transfer of the wireless power, 
 wherein the wireless power transmitter: 
 receives random address information of the out-of-band communication via the in-band communication from the wireless power receiver, 
 receives an advertisement packet including the random address information, and 
 establishes a connection of the out-of-band communication with the wireless power receiver after receiving the random address information via the in-band communication and receiving the advertisement packet. 
 
     
     
       9. The wireless power transmitter of  claim 8 , wherein the out-of-band communication is a bluetooth low energy (BLE) communication. 
     
     
       10. The wireless power transmitter of  claim 8 , wherein the wireless power transmitter is a scanner. 
     
     
       11. The wireless power transmitter of  claim 10 , wherein the wireless power transmitter starts scanning after receiving the random address information via the in-band communication, and
 wherein the wireless power transmitter receives the advertisement packet during the scanning. 
 
     
     
       12. The wireless power transmitter of  claim 8 , wherein, based on establishing the connection of the out-of-band communication, the wireless power transmitter transitions from the in-band communication to the out-of-band communication. 
     
     
       13. The wireless power transmitter of  claim 8 , wherein, in a negotiation phase, the wireless power transmitter receives the random address information of the out-of-band communication via the in-band communication from the wireless power receiver.